[Syntax] Silence "unused function" warning in no-assert builds. NFC

A helper `isImpicitExpr` is only used inside assert.

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/lib/Tooling/Syntax/BuildTree.cpp b/clang/lib/Tooling/Syntax/BuildTree.cpp
index 1be23f7e797..dddc265c8c4 100644
--- a/clang/lib/Tooling/Syntax/BuildTree.cpp
+++ b/clang/lib/Tooling/Syntax/BuildTree.cpp
@@ -21,12 +21,14 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/Casting.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/FormatVariadic.h"
 #include "llvm/Support/raw_ostream.h"
 #include <map>
 
 using namespace clang;
 
+LLVM_ATTRIBUTE_UNUSED
 static bool isImplicitExpr(clang::Expr *E) { return E->IgnoreImplicit() != E; }
 
 /// A helper class for constructing the syntax tree while traversing a clang